This is the docker + rails + spring + mysql environment starter. This program reffers to "https://qiita.com/kawasin73/items/2253523be18e5afd994f" or "https://github.com/kawasin73/rails_docker_template.git". kawasin73 uses postgresql but I use mysql as DB.

You can build the environment by just typing the command writtten below.

$ git clone https://github.com/ryoma510/docker_rails_spring_mysql_template.git
$ cd docker_rails_spring_mysql_template
$ script/init && script/bootstrap

You can connect to the mysql built in docker container by executing the command below

$ mysql -u root -h 127.0.0.1 -P 13306 --protocol=tcp -p

On executing this, you are going to be asked password of mysql on docker. Default password is set to be "password". You may change the mysql password as you like.

Remember that you must set any of these environment variables below.

• MYSQL_ROOT_PASSWORD
• MYSQL_ALLOW_EMPTY_PASSWORD
• MYSQL_RANDOM_ROOT_PASSWORD

For more details, you may reffer to https://hub.docker.com/_/mysql/

You can use rails command on spring container like below

$ docker-compose exec spring < command you want to use >

ex.)
$ docker-compose exec spring rails db:migrate
$ docker-compose exec spring bundle install

By using spring container, you can execute rails command fast.

By executing "bundle install" in ENTRYPOINT, it is possible to cache gems into Docker Volume. You don't have to install all gems every time when some gems are added in your project.